Pantograph engraving-machine.



W. H. HOPE.

PANTOGRAPH ENGRAVING MACHINE. APPLICATION FILED JULY 22. ms.

Patented Mar.13,l917.

2 SHEETS-SHEET I.

W. H. HOPE.

PANTOGRAPH ENGRAVING MACHINE.

APPLICATION FILED JULY 22. 19:6.

1 ,21 9, 3 l 1 Patented Mar. 13, 1917.

2 SHEETS-SHEET 2.

TIIJRNEY- @FFTQE.

WILLIAM H. Horn, or rnovrnnncn, nnonn ISLAND.

PANTOGRAPH ENGRAVING-IVIACI-IINE.

Specification of Letters Patent.

Patented Mar. 13, 1917.

Application filed July 22, 1916. Serial N0. 110,703.

To all whom, it may concern:

Be it lmown that 1, WILLIAM H. Horn, a citizen of the United States,residing at Providence inthe county of Providence and State of RhodeIsland, have invented a new and useful Improvement in PantographEngraving-Machines, of which the following is a specification.

This invention relates to certain new and useful improvements in apantograph engraving machine and especially to a machine for engravingdesigns or patterns on cylindrical surfaces, as for instance, the largerolls used in printing rugs or carpet runners. These rolls, running fromfour to seven or more feet, in diameter, are so extremely heavy that theordinary pantograph cannot well be employed owing to the fact that, inthe ordinary pantograph, the roll has a connection with the platen tablewhich causes it to be rotated upon a movement of the stylus.

The primary object of the present invention, therefore, is to provide amachine which will overcome these defects and will be thoroughlyeflicient in operation.

A further aim of the invention is to provide a pantograph engravingmachine in which the stylus and cutting point are supported for movementabout the roll.

Another object resides in the provision of a machine of the above typein which more than one operative can work thereon at the same time tothereby facilitate and expedite the engraving operation.

The invention further resides in the salient features of constructionand the arrangements and combinations of parts hereinafter described andclaimed, the preferred embodiment of the invention being illustrated inthe accompanying drawings wherein Figure 1 is an end elevation of theimproved pantograph engraving machine, parts of the frame being omitted.

Fig. 2 shows the machine in side or front elevation, and

Fig. 3 is a detailed perspective of a lever employed in the mechanismfor lifting the cutting points from the work.

The numeral 1 designates the frame having a horizontal platform 2 fromwhich rises a pair of uprights 3 having roller bearings 4: at theirupper ends.

The metal roll 5, which is coated with varnish, has trunnions 6 journaled in the roller bearings 4, and fixed on the projecting end ofone trunnion is a spacing wheel 7 having a peripheral series ofpredeterminedly spaced apertures 8 in which a catch or stop 9, on theadjacent upright 3, is adapted to selectively engage for holding theroll 5 fixed.

Spaced outwardly from the uprights 3 are the frame standards 10 to theopposite sides of which and concentric with the roll, are pivoted thearms of inverted U-frames 11 which are counterbalanced by weights 12. Oneach frame 11 is supported a graver carriage 13 for movementlongitudinally of the roll, and on said carriage is pivoted at 1 1 oneor more cutting points 15. It is obvious that the cutting points aremounted so as to move in any direction over the cylindrical surface ofthe roll 5, the counterbalanced frames 11 facilitating thecircumferential movements of the cutters without interfering with thelongitudinal movements.

The design or pattern plates 16 are mounted on supports 17 extendingupwardly from the platform 2 in arcs concentric with the roll 5. Eachcarriage 13 is operated through the medium of an angular frame 18 whichcarries on its outer or lower end a stylus 19 for following the designon plate 16. Therefore, as the stylus traces the particular de sign onplate 16, the frame 18 will impart the movements to the graver carriagefor moving the same across the roll or up and down on the circumferencethereof.

A wire 20, or other connection, joins each pivoted cutter 15 to the arm21of a bellcrank lever 22, journaled in a frame 18, whereby, ondepressing the arm 23 of the lever 22, the cutting point may be elevatedfrom the roll.

In practice, an operative on each side of the machine can copy hisparticular design from plate 16 onto the roll, and subsequent to thistransferring operation by each operative, new design plates aresubstituted for the ones just copied and the roll rotated sufficientlyto present new surfaces beneath the cutting points, this operation beingcontinued until the entire roll surface has been finished.

The circumference of the roll is intended to receive a complete numberof transfers from the design plate so that as each plate represents adivision of the completed design so might the circumference be said tohave a corresponding number of divisions.

The apertures 8 of the spacing wheel correspond in number to thedivisions of the completed design whereby, as each design section iscopied and the roll rotated, the latch 9 will arrest the roll at theproper point to present a new division of the roll circumference.Consequently, after all of the divisions have been engraved by thecutting points, the complete design will be formed on the circumferenceof the roll.

Thus, the engraving is expeditiously carried on and, since the movementsof the carriages are free, an efficient operation is readily afiorded.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is 1. In a pantograph engraving machine, aframe having bearings for a roll to been graved, a graver carriagemounted on the frame for movement about the roll, a cutter pivoted tothe carriage for cutting the roll, a support arranged concentric withthe roll for supporting a design pattern, a second frame connected withthe carriage, a stylus on the second frame for following a pattern onthe support, and means on the second frame connected to thepivoted'cutter for raising and lowering the latter from and onto theroll.

2. In a pantograph engraving machine, a frame having bearings for a rollto be engraved, a U-frame pivotedto the first frame for movement aboutthe roll concentric therewith, a graver carriage supported on theU-frame for movement over the circumference of the roll longitudinallyof the latter, a cutting point on the carriage, a design patternsupport, and a stylus connected to the carriage and arranged forfollowing a pattern on the support.

8. In a pantograph engraving machine, means for supporting a roll to beengraved, a graver carriage movable relative and concentric to the rollto be engraved, a cutter on the carriage for cutting a design on theroll, a design pattern support, and a stylus connected with the carriagefor following a pattern on the support and means for supporting thegraver carriage.

l. In a pantograph engraving machine, means for supporting a roll to beengraved, a graver carriage, means for holding the roll fixed, a cutterpivoted to the carriage for cutting the roll, a support arrangedconcentric with the roll for supporting a design pattern, a frameconnected with the carriage, a stylus on the frame for following apattern on the support, means on the frame connected to the pivotedcutter for raising and lowering the latter from and onto the roll andmeans for supporting the graver carriage.

5. In a pantograph engraving machine, means for supporting a roll to beengraved, a graver carriage, means supporting the carriage forconcentric and longitudinal movement relative to the roll, a cutter onthe carriage a stylus connected with the carriage roll concentrictherewith, a graver carriage supported on the U-frame for movement overthe circumference of the roll longitudinally of the latter, a cuttingpoint on the carriage, a design pattern support, and a stylus connectedto the carriage and arranged for following a pattern on the support.

7. In a machine of the character described, means for supporting a rollto be engraved, a plurality of U-frames having their arms extendingradially of the roll and pivoted concentric thereto on said frame, agraver carriage mounted on each U-frame for movement longitudinally ofthe roll, a cutter on each carriage, and a stylus connected to eachcarriage.

8. In a machine of the character described, means for supporting a rollto be engraved, a plurality of U-frames having their arms extendingradially of the roll and pivoted concentric thereto on said frame,counterbalance means for the car riages, a carriage movable on eachU-frame longitudinally of the roll, a cutter on each carriage, a designpattern support, and a stylus connected to each carriage and arrangedfor following a pattern on the support.

9. In a machine of the class described, means for supporting a roll tobe engraved, a graver carriage mounted on a supporting U-fra'me formovement concentric with and longitudinally of the roll, a cutter on thecarriage, a support for holding one section at a time of the designpattern to be produced, a stylus for following the pattern connected tothe carriage, and means for holding the roll fixed at predeterminedpoints corresponding to the number ofpat tern sections whereby when allthe pattern sections are finished acompleted design will be obtained onthe roll.

10. In a pantograph engraving machine, means for supporting a roll to beengraved, a graver carriage, means for supporting the carriage forconcentric and longitudinal movement relative to the roll, a cutterpivoted on the carriage, a stylus connected with the latter, a leverpivoted adj acent the stylus, and a connectionbetween the'lever andpivoted cutter whereby the latter may be raised from the roll.

11. In a machine of the class described, means for supporting a roll tobe engraved,

a graver carriage mounted upon a U-frame for movement concentric withand longitudinally of the roll, a cutter on the carriage, a support forholding one section at a time of the design pattern to be produced, astylus for following the pattern connected to the carriage, and aspacing wheel fixed with respect to the roll for rotating the roll tocorrespond to the pattern sections.

12. In a pantograph engraving machine, a frame, a counterbalancedU-frame pivoted to the first frame, a graver carriage movably mounted onthe U-frame, a cutter pivoted to the carriage, a stylus-frame connectedwith the carriage, a stylus on the last frame, and means on the stylusframe connected to the pivoted cutter for raising and lowering thecutter. I

13. In a pantograph engraving machine, a frame having roll bearings, acounterbalanced U-frame pivoted to the first frame, a graver carriagemovably mounted on the U-frame, a cutter pivoted to the carriage, astylus-frame connected with the carriage, a stylus on the last frame, apattern support arranged adjacent the stylus and con- Oopies of thispatent may be obtained for five cents each, by addressing the centricwith the roll bearings, and means on the stylus-frame connected to thepivoted cutter for raising and lowering the cutter.

14. In a pantograph engraving machine, a frame having bearings for theroll, means for holding the roll fixed on the frame, a

graver carriage mounted on a counterbalanced U-frame concentric with theroll and for movement about the latter, a cutter pivoted to the carriagefor cutting the roll, a support arranged concentric with the roll forsupporting a design pattern, a frame connected with the carriage, astylus on the second frame for following a pattern on the support, andmeans on the stylus frame connected to the pivoted cutter for raisingand lowering the cutter from and onto the roll.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

WILLIAM H. HOPE.

wommissioner of Eatents,

Washington, D. 0."

